A marketing update changed 150 images on a website that is delivered through CloudFront, but some updated images still show the old versions. The distribution’s default TTL is 1 week. What is the most operationally efficient method to ensure the new images are served immediately?

Submitting a CloudFront invalidation for the affected objects is the most operationally efficient method. Invalidation requests tell CloudFront to immediately remove cached versions of specified objects from all edge locations, forcing CloudFront to fetch the latest versions from the origin on subsequent requests. This ensures users see the updated images without delay. Provisioning a new distribution and updating Route 53 is overly complex and time-consuming for a simple content update. Uploading to different paths requires website code changes, which is inefficient and creates redundant content. Changing the default TTL only affects future caching behavior and doesn't immediately address already cached, outdated content. While it could be combined with invalidation, invalidation alone is sufficient and more direct for immediate updates.